Hookah stem



FIG. 1 is a side elevational view of the hookah stem;

FIG. 2 is a upper perspective view of the hookah stem; and,

FIG. 3 is a lower perspective view of the hookah stem.

The hookah stem is understood to be radially symmetric. In the drawings, the broken lines depict unclaimed environment. 

CLAIM The ornamental design for a hookah stem, as shown and described. 